Not only does the book explain where in London these artefacts were discovered, it tells you where you can see them now; many are right under our noses, in institutions such as the British Museum and Museum of London.

If you fancy owning the book — aimed largely at students, but a handsome coffee table piece all the same — you'll have to excavate your pockets: it'll set you back the emperor's ransom of £120.

Only three Hadrian's heads? Surely there must be hundreds of them? There were quite a few at the British Museum exhibition a couple of years back; I remember examining the earlobes for what were said to be telltale creases indicating that he was diabetic.